Organic halogen compounds photofragmentation, photoreduction and nucleophilic photosubstitution

2 Organic Halogen Compounds Photofragmentation, Photoreduction and Nucleophilic Photosubstitution 

Photolysis of vinyl iodides is a convenient method for the generation of vinyl cations, highly reactive intermediates that are difficult to generate by thermal processes. Irradiation of 1-iodocyclohexene (478, X = I) in methanol in the presence of zinc as an iodine 

Simple aromatic halides display two principal superimposing absorption bands, n,n and a,a, tailing over 250 nm. Intersystem crossing (ISC) to T, can be fast and efficient due to increased spin orbit coupling attributed to the heavy-atom effect (Section 4.8) of halogen atoms (Br, y 42- 49,i3i6 subsequent C—X bond homolysis may afford aryl radicals and 

Some important persistent environmental pollutants, such as l,l,l-trichloro-2,2-bis (4-chlorophenyl)ethane (DDT), polychlorinated biphenyls (PCBs), dibenzo-p-dioxins (PCDDs) and polybrominated diphenyl ethers (PBDEs), are aryl halides therefore, studies 

Case Study 6.35 Synthesis of cage compounds - cubane 

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